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Synthesis and Characterization of Yellow Gypsum from LD Slag Fines Generated in a Steel Plant


Affiliations
1 R&D and Scientific Services Department, Tata Steel Limited, Jamshedpur 831 007, India
2 FME Department, Applied Chemistry Department, Indian School of Mines, Dhanbad 826 004, India
3 Applied Chemistry Department, Indian School of Mines, Dhanbad 826 004, India
 

We describe here a simple method for synthesis of a value-added product (yellow gypsum) from Linz-Donawitz slag (LD slag), which is an industrial waste product of the steel industry. XRD analysis of the product confirmed the presence of anhydrite and gypsum phases as well as the presence of iron, silica and titanium in the form of fayalite and illmenite phases. A weight loss of 17.26% was observed from the TG analysis, indicating the presence of mixture of the dihydrate, hemihydrate, soluble γ-anhydrite and insoluble β-anhydrite phases of gypsum in the product.

Keywords

LD Slag, Steel Plant, Synthesis and Characterization, Yellow Gypsum.
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  • Synthesis and Characterization of Yellow Gypsum from LD Slag Fines Generated in a Steel Plant

Abstract Views: 413  |  PDF Views: 148

Authors

Shrenivas Ashrit
R&D and Scientific Services Department, Tata Steel Limited, Jamshedpur 831 007, India
Pradip K. Banerjee
R&D and Scientific Services Department, Tata Steel Limited, Jamshedpur 831 007, India
Ravikrishna V. Chatti
R&D and Scientific Services Department, Tata Steel Limited, Jamshedpur 831 007, India
Venugopal Rayasam
FME Department, Applied Chemistry Department, Indian School of Mines, Dhanbad 826 004, India
Udayabhanu Gopalakrishnan Nair
Applied Chemistry Department, Indian School of Mines, Dhanbad 826 004, India

Abstract


We describe here a simple method for synthesis of a value-added product (yellow gypsum) from Linz-Donawitz slag (LD slag), which is an industrial waste product of the steel industry. XRD analysis of the product confirmed the presence of anhydrite and gypsum phases as well as the presence of iron, silica and titanium in the form of fayalite and illmenite phases. A weight loss of 17.26% was observed from the TG analysis, indicating the presence of mixture of the dihydrate, hemihydrate, soluble γ-anhydrite and insoluble β-anhydrite phases of gypsum in the product.

Keywords


LD Slag, Steel Plant, Synthesis and Characterization, Yellow Gypsum.



DOI: https://doi.org/10.18520/cs%2Fv109%2Fi4%2F727-732